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NIST Atomic Spectra Database
Ionization Energies Data

Tc (all spectra)
43 Data Rows Found 
Example of how to reference these results:
Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2023). NIST Atomic Spectra Database (ver. 5.11), [Online]. Available: https://physics.nist.gov/asd [2024, April 19]. National Institute of Standards and Technology, Gaithersburg, MD. DOI: https://doi.org/10.18434/T4W30F
BibTex Citation (new window)
 

 At. Num.   El.  name   Isoel.  Seq.   Ground  Shells a   Ground  Level   Ionization  Energy 
 (eV) 		 Uncertaintyb 
 (eV) 		  References 
43  Technetium  Tc  [Kr]4d55s2   6S5/2    7.11938                 0.00003   L15237 
43  Technetium  Mo  [Kr]4d55s   7S3    [15.26]                     L3466,L17503 
43  Technetium  Nb  [Kr]4d5   6S5/2    [29.55]                     L17276 
43  Technetium  Zr  [Kr]4d4   5D0    (41.0)                    1.7       L8672c99 
43  Technetium  Y  [Kr]4d3   4F3/2    (57.0)                    1.9       L8672c99 
43  Technetium  Sr  [Kr]4d2   3F2    (72.0)                    2.0       L8672c99 
43  Technetium  Rb  [Kr]4d   2D3/2    (88.0)                    2.0       L8672c99 
43  Technetium  Kr  [Ar]3d104s24p6   1S0    (150.0)                    2.1       L8672c99 
43  Technetium  Br  [Ar]3d104s24p5   2P°3/2    (169.0)                    2.2       L8672c99 
43  Technetium  Se  [Ar]3d104s24p4   3P2    (189.9)                    2.2       L8672c99 
43  Technetium  As  [Ar]3d104s24p3   4S°3/2    (214.0)                    2.4       L8672c99 
43  Technetium  Ge  [Ar]3d104s24p2   3P0    (239.0)                    2.5       L8672c99 
43  Technetium  Ga  [Ar]3d104s24p   2P°1/2    [262.08]                   0.12      L6833 
43  Technetium  Zn  [Ar]3d104s2   1S0    (311)                      3         L8672c99 
43  Technetium  Cu  [Ar]3d104s   2S1/2    [338.55]                   0.17      L10278 
43  Technetium  Ni  [Ar]3d10   1S0    (604)                      3         L8672c99 
43  Technetium  Co  [Ar]3d9   2D5/2    (655)                      3         L8672c99 
43  Technetium  Fe  [Ar]3d8   3F4    (713)                      3         L8672c99 
43  Technetium  Mn  [Ar]3d7   4F9/2    (773)                      3         L8672c99 
43  Technetium  Cr  [Ar]3d6   5D4    (829)                      4         L8672c99 
43  Technetium  V  [Ar]3d5   6S5/2    (904)                      4         L8672c99 
43  Technetium  Ti  [Ar]3d4   5D0    (968)                      4         L8672c99 
43  Technetium  Sc  [Ar]3d3   4F3/2    (1 032)                      4         L8672c99 
43  Technetium  Ca  [Ar]3d2   3F2    (1 102)                      4         L8672c99 
43  Technetium  K  [Ar]3d   2D3/2    (1 166)                      4         L8672c99 
43  Technetium  Ar  [Ne]3s23p6   1S0    [1 354]                      4         L11770 
43  Technetium  Cl  [Ne]3s23p5   2P°3/2    [1 411.6]                    1.5       L11770 
43  Technetium  S  [Ne]3s23p4   3P2    [1 479.5]                    2.0       L11770 
43  Technetium  P  [Ne]3s23p3   4S°3/2    [1 559]                      6         L11770 
43  Technetium  Si  [Ne]3s23p2   3P0    [1 638]                      4         L11770 
43  Technetium  Al  [Ne]3s23p   2P°1/2    [1 689]                      8         L11770 
43  Technetium  Mg  [Ne]3s2   1S0    [1 838]                      3         L11770 
43  Technetium  Na  [Ne]3s   2S1/2    [1 900.28]                   0.06      L11770 
43  Technetium  Ne  1s22s22p6   1S0    [4 505.0]                    2.5       L11770 
43  Technetium  F  1s22s22p5   2P°3/2    [4 681]                      8         L11770 
43  Technetium  O  1s22s22p4   3P2    [4 874]                      10         L11770 
43  Technetium  N  1s22s22p3   (0,3/2)°3/2    [5 060]                      40         L11770 
43  Technetium  C  1s22s22p2   3P0    [5 361]                      6         L11770 
43  Technetium  B  1s22s22p   2P°1/2    [5 570]                      4         L11770 
43  Technetium  Be  1s22s2   1S0    [5 838]                      6         L11770 
43  Technetium  Li  1s22s   2S1/2    (6 008.391)                  0.017     L16264c99 
43  Technetium  He  1s2   1S0    (25 004.531)                  0.010     L21139 
43  Technetium  H  1s   2S1/2    (25 787.047)                  0.016     L19200 
Notes:
a Designations used in the ground shell lists:
[Ne] = 1s22s22p6
[Ar] = 1s22s22p63s23p6
[Kr] = 1s22s22p63s23p63d104s24p6
b Uncertainties of some of the listed values are unknown.

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